Minding stamped her class on the Camelot Irish EBF Mooresbridge Stakes at Naas.
The standout filly of her generation having won the 1000 Guineas and the Oaks, she also beat the boys over a mile in the Queen Elizabeth II Stakes on Champions Day last year.
She will face much sterner tasks than this as the season unfolds, but it was pleasing to see Aidan O'Brien's four-year-old look in such good form so early in the campaign.
Jim Bolger's Moonlight Magic tried to take her on for the lead early, but Ryan Moore soon established an advantage which his mount would never relinquish.
Without being asked too many questions, Minding took a few lengths out of the field and the 1-3 favourite extended in pleasing fashion.
Moonlight Magic came home a clear second best as Moore allowed Minding to coast across the line.
Speaking afterwards, O'Brien said: "We're delighted to get her started back, it's nice to get her going again. Ryan was very happy with her.
"She has the options of the Tattersalls (Gold Cup) or the Lockinge in Newbury. We'll probably be looking at the Tattersalls, I'd imagine that's where we'll go.
"We'll take it one at a time but we'd be thinking of the Prince Of Wales at Royal Ascot then.
"She's a great filly and what she did last year was incredible. To go back to a mile at the end, it's very rare a horse can do that over a mile, a mile and a quarter and a mile and a half.
"She's done well physically and has changed into a four-year-old. When she was a two-year-old she looked like a two-year-old and then she looked like a three-year-old, but sometimes horses going from three to four don't look like four-year-olds. She has changed."
Rehana set herself up for a tilt at the Irish 1,000 Guineas with an authoritative success in the Canford Cliffs Athasi Stakes.
Mick Halford's filly had finished a close-up third in a Guineas Trial on her reappearance and was a 6-4 joint-favourite with Dermot Weld's year older Rose De Pierre.
The two had it between themselves from some way out but it was the younger Rehana with Shane Foley on her back who pulled two and three-quarter lengths clear.
"It went to plan. She's a lovely filly and she had some good form at the top level," said Halford.
"It's just nice for her to get an opportunity there and she loves that ground.
"We said we'd keep it simple with her. It probably wasn't ideal to make the running but she doesn't mind as she's straightforward.
"Ground is important to her and if she gets her ground she'll take her chance in the (Irish) Guineas.
"It's beautiful ground there and she has such an action that she floats over it.
"We'll see how she is come the time. That will do her confidence good. She's had a couple of races against top class fillies and even her comeback run was good.
"It's amazing at this time of year if the fillies get their head in front it does a lot for their confidence. She's been training very well.
"On that ground it's easier. Her fitness is quite good as well with the run under her belt. When they enjoy that ground it's a big help."
When asked if she could step up in trip in time, Halford responded: "No. She'll go a mile, I'd imagine, she's not short of pace."
Doctor Geoff looks a colt with a big future after winning the Tetrarch Stakes on his seasonal reappearance for Ger Lyons and Gary Carroll.
With hot favourite Peace Envoy locked away with nowhere to go, Carroll brought the 8-1 chance down the outside with a winning run.
"He's a horse we've always liked. When he won his maiden David (Spratt, owner) said he had one of the best speed figures of maiden winners last season," said Lyons.
"I just thought seven furlongs on that ground might be a tad sharp for him, but Gary said he was only going through the motions waiting for the gap. When he got the gap he sprinted clear.
"He'd have to come into the reckoning for something like the Jersey. To win a Jersey you want to be able to get a mile and have the speed for seven. He falls into that bracket."
Dali had the look of an Ascot two-year-old for O'Brien when winning the Irish Stallion Farms EBF Race as the 4-6 favourite under Moore.
"You'd be delighted with that. He came forward from his first run and he'll come forward again," said O'Brien.
"I think five or six furlongs suits him, he has plenty of speed, when he learns what he's at."
When asked if he could be an Ascot horse, O'Brien added: "He could be and you'd like to get another run into him before that."
There was no secret about the regard in which Jessica Harrington's Alpha Centauri was held before the Coolmore No Nay Never Irish EBF Fillies Maiden.
Available at 5-1 in the morning, she registered an all-the-way win as the 2-1 favourite.
"I must have a mole in my yard because everyone knew about her!" said Harrington.
"When she came to me before Christmas she weighed 530 kilos which is heavier than most of the jumpers. I sent them back three times to weigh her because I said 'you must have got it wrong'!
"She has plenty of pace but you'd imagine she'll be better over longer as she's out of a Caerleon mare. We'll see where we go now. She loved that ground."
Virtudes (8-1) put a poor debut run behind her to win the Panoramic Restaurant Maiden for Godolphin, Willie McCreery and Billy Lee.
"She was too disappointing the first day as she's been working well," said McCreery.
"Billy just thought the softer ground caught her out the last day. She travelled well and I suppose the experience helped her there today."