Mix flour, grated potato, buttermilk & salt in a mixing bowl, until mix will pour. Use a good non stick 10” pan. Heat pan with olive oil & butter. Add Boxty mix with a large spoon & spread freely over the pan surface. Fry for 4 minutes on each side.
When both sides are golden brown remove from heat and keep warn in the oven.
Heat 4 rings of black pudding gently in the pan. Dice boxty in wedges and arrange on a warm plate. Place salad in bowl and dress with vinaigrette. Arrange a small bouquet type pile on the boxty & garnish with cherry tomato.