Spaghetti sauce à la Marilou - Trois fois par jour

Ingredients

• 1 yellow onion, chopped
• 4 carrots, peeled
• 1/2 lb white mushrooms, sliced
• 2 tablespoons butter
• 2 tablespoons olive oil
• 2 hot Italian sausages, without the casings
• 1 lb extra lean ground beef
• 1 lb extra lean ground lamb
• 1/2 cup veal stock (typically found in the refrigerated meat section of the grocery store)
• 1 red pepper
• 1 yellow pepper
• 2 cloves garlic
• 5 oz (1 can, 156 ml) tomato paste
• 2 3/4 cups store-bought tomato sauce
• 2 cans (800g each) whole peeled tomatoes (see tip)
• 2 teaspoons maple syrup
• 1/2 teaspoon pickling spices, crushed in a mortar or ground
• 2 bay leaves
• Salt and pepper