Vegetable and Bean Stew (Stove Top and Instant Pot)

Name: Vegetable and Bean Stew (Stove Top and Instant Pot)
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Cuisine: European, Italian, Mediterranean
Ingredients: 1 onion, chopped; 2 cloves of garlic, crushed; 1 large leek, chopped; 2 medium carrots, diced; 2 stalks of celery, chopped; 300g of butternut squash, chopped; 2.5 cups of mixed beans (canned); 2 tbs of tomato paste; 6 cups of vegetable stock; 1/2 tbs of Italian mixed herbs; 1/2 teaspoon of fennel seed, crushed; salt and black pepper; cooking oil spray