3 open face chicken onion burger Recipes

olive oil (for brushing ), mayonnaise, chopped fresh basil plus 8 large leaves, divided, chopped drained cornichons or dill pickle plus 1 1/2 tbsp brine from jar, green onions, finely chopped, ground chicken, thick slices country white bread, thick slices from large red or orange heirloom tomato

ground chicken, chopped fine green pepper, chopped fine fresh mushrooms, shredded sharp cheddar cheese, salt and pepper, butter, onions, sliced and separated, french bread