Nezar's juicy burger surprise

Name: Nezar's juicy burger surprise
Cuisine: American
Ingredients: 500g ground beef; 50g feta cheese; 1 tsp soy sauce; 2 Tbs chutney; 3 Tbs Tomato paste; 1 tsp garlic; 1/2 tsp paprika; Pinch salt; 1/4 tsp ground pepper; Pinch of coriander; Pinch of cayenne pepper; 1/2 onion thinly sliced; 1 1/2 cup grated cheese; 2-6 sweet and tangy gherkins; 1 Tomato thinly sliced; 1 cup lettuce; 2-4 Buns