Chicken Parm Sandwich

### Chicken Parm Sandwich #### Pesto: - 2 handfuls of basil - ½ cup walnuts - ½ cup grated Parmesan cheese - ½ cup olive oil - Pinch of salt #### Marinara Sauce: - 1 onion, finely diced - 4 cloves garlic, chopped - 1 jar passata - 5 basil leaves - Salt and pepper, to taste #### Chicken: - 1 chicken breast, butterflied into two slices - 1 cup plain flour - 1 cup bread crumbs - 2 eggs, beaten