Carve tomatoes, blanch and skin them. Then cut in half, remove seeds and dice finely. Peel and dice the garlic. Steam briefly with tomatoes in 1 tbsp. hot oil. Season, take out
Wash the liver and pat dry. Heat 1 tablespoon of oil in the frying fat. Fry the liver for 3-4 minutes on both sides. Season with salt and pepper. Take out and cool down. Cut into strips
Peel and chop the onion. Clean and wash the mushrooms. Cut 3-4 into slices, chop the rest. Heat 1 tbsp. oil in the frying fat. Brown the mushroom slices in it, take them out. Steam the onion and the rest of the mushrooms in the frying fat for 5 minutes. Wash and finely chop the sage. Season mushrooms with sage, salt and pepper
Drizzle bread with 1-2 tablespoons of oil. Roast under a hot grill or in a pan from both sides. Cover 4 slices each with tomatoes, mushrooms, pesto and liver. Garnish with cheese and pine nuts