Preheat oven to 400 degrees

Line a large baking sheet with parchement paper

Cut away all the green leaves but leave the core intact from the cauliflower head and wash it and the mini peppers and dry well

Slice the Cauliflower length wise in a 3/4-1 inch slices and place on parchement paper lined baking pan

Slice the tops off the mini peppers then slice them length wise and deseed them , place deseeded mini peppers in a bowl in set aside

Mix olive oil, lemon juice , parsley , salt and pepper in a small bowl

Liberally brush the cauliflower with the olive oil mixture on both side

Pour remaining olive oil mixture over peppers and toss

Place the peppers on the baking sheet with the cauliflower

Lightly salt and pepper the entire pan if desired

Bake in preheated oven for 30 minutes flipping everything over after 15 minutes