Wash, clean, quarter and seed the tomatoes. Cut the flesh into small cubes. Peel and finely dice the vegetable onion. Wash and chop basil. Melt butter. Fry diced onion in it.
Add the tomatoes, steam for another 2-3 minutes. Season with salt, pepper and a few dashes of Tabasco. Stir in basil. Spread the filling on the flat cakes, roll them up and put them into a suitable casserole dish.
Grate cheese, mix with crème fraîche and season with salt and pepper. Spread over the flat cakes and bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 15-20 minutes.
Meanwhile cut the avocados in half for the dip, remove the stone. Spoon the flesh from the skin. Peel the garlic and press it through a garlic press. Puree the fruit flesh, garlic and lemon juice.
Season to taste with salt, pepper and some Tabasco.