Healthy Creamy Roasted Tomato Soup

Ingredients

• 1 medium onion
• 1 tbsp olive oil
• 1/2 cup low-fat milk
• 1/4 cup raw cashew nuts
• 6 large tomatoes
• 1/4 tsp cayenne pepper
• 1 whole garlic bulb
• salt and pepper
• 1 cup vegetable broth
• 2 tbsp fresh thyme leaves