Vegan Bolognese (Made With Lentils!)

Name: Vegan Bolognese (Made With Lentils!)
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Cuisine: European, Italian, Mediterranean
Ingredients: 1 cup dried brown or green lentils OR 2 cups canned lentils, rinsed; 4 cloves garlic, one whole and 3 minced, divided; 1 bay leaf; 3 Tbsp. extra-virgin olive oil; 1 yellow onion, diced; 2 ribs celery, diced; 2 carrots, peeled and diced; 1 tsp. dried oregano; 1 tsp. kosher salt; ¼ tsp. red pepper flakes; 2 (28-oz.) cans whole tomatoes with their juices; 2 tsp. sugar; 1 pound spaghetti