Pesto Chicken

INGREDIENTS

2 1/2 lb

boneless skinless chicken breast, 4 pieces, pounded to ¾-inch thickness

1/2 cup

extra-virgin olive oil, (120ml), plus more for drizzling

1/2 tsp

kosher salt, plus more for seasoning

black pepper, as needed for seasoning

1 cup

basil, (30g, 1 ounce) packed

1 cup

baby spinach, (30g, 1 ounce) packed

3 cloves

garlic, unpeeled

1/4 cup

walnuts, plus more for garnish

1/4 cup

grated parmesan cheese, plus more for garnish

1 cup

diced tomatoes, ¼-inch dice