Clean and wash the sugar snap peas and cut into fine strips. Cut mozzarella into thin slices. Wash mint and shake dry. Pluck off the leaves and chop 2/3. Peel and chop onion.
Heat 1 tablespoon of oil in a saucepan. Sauté the sugar snap peas in it and take them out. Sauté onion in it until transparent. Add frozen peas and about 5 tbsp. water, season with salt, pepper and 1 pinch of sugar. Bring to the boil, cover and stew for about 5 minutes.
In the meantime heat 4-6 tablespoons of oil in two portions in a large frying pan. Fry the slices of bread in it in portions while turning them golden brown and take them out.
Finely puree the peas and chopped mint with a hand blender and season to taste. Spread the puree on the bread slices. Arrange mozzarella and mangetouts on top and sprinkle with the rest of the mint leaves.