Pressure Cooker Manhattan Clam Chowder

Name: Pressure Cooker Manhattan Clam Chowder
Ingredients: 1 tablespoon(s) olive oil; 1/2 stick(s) butter, unsalted; 1 medium yellow onion; 2-3 stalk(s) celery, diced; 2 large carrots, peeled & diced; 1 large parsnip, shredded *optional; 1 small zucchini, shredded *optional*; 3-4 medium potatoes, peeled & diced; 1/4 cup(s) all-purpose flour; 1 cup(s) chardonnay (1 buy 4pk mini bottles); 4 cup(s) chicken stock, no salt; 1 large bay leaf. dried; 1 teaspoon(s) thyme, dried; 1 teaspoon(s) red pepper flakes; 2 tablespoon(s) Worcestershire sauce; 2 clove(s) garlic, diced; 1/2 can(s) tomato paste; 1 can(s) stewed tomatoes with juice; 1 can(s) baby clams (strain & reserve juice); 1 can(s) evaporated milk; 2-4 pinch(es) salt and pepper