Vegan Spinach Soup

Ingredients ▢2Tablespoons Olive Oil ▢1Medium Onion White, Yellow or Brown, Chopped ▢2Cloves Garlic Crushed ▢⅛teaspoon Red Pepper Flakes or Cayenne Pepper, Optional ▢3Medium Potatoes (1 pound / 450g) Peeled and Chopped ▢3cups Vegetable Stock (720ml) or Broth ▢1pound Baby Spinach (450g) ...