Cut half of the bell pepper into small cubes.
Finely chop the onion.
Cut the champignons into small pieces.
Grate the cheese on a fine grater.
Heat vegetable oil in a saucepan or deep frying pan. Add bell pepper, onion and champignons to the saucepan. Fry everything over medium heat for 5 minutes.
Add shrimp to the vegetables and fry for another 2 minutes.
Add tomato paste, salt, black pepper and paprika. Mix everything and simmer for a couple more minutes.
Place the shrimp, mushrooms and vegetables into small baking dishes.
Sprinkle the julienne portions with grated cheese.
Place the dish in the oven to bake for 10 minutes.