Alternate rows of sliced tomatoes, onions and potatoes in a gratin dish. Sprinkle with finely chopped garlic, basil, salt and pepper. Drizzle with olive oil.
FINALLY:
Bake for 40 minutes in a hot oven at 180°C, thermostat 6 (electric oven).
So ! Your TIANA TOMATO AND POTATO is ready!
