Slow Cooker Lentil and Sausage Soup

Ingredients

• 1 Onion, diced
• 1 stalk Celery, diced
• 2/3 lb Carrots, diced
• 3 links Sausage, cooked and chopped
• 3/4 cup French or green lentils, uncooked
• 1 quart Beef stock
• 3 Tbsp Tomato paste
• 1 cup Water
• 1 tsp Cumin
• 1/4 tsp Salt
• 2 Bay leaves
• 1/2 loaf Crusty bread
• 1/2 bulb Shallots, diced
• 1/2 lb Cucumbers, sliced
• 1 tsp Dijon mustard
• 1 1/2 Tbsp Red wine vinegar
• 3 Tbsp Olive oil
• 4 oz Baby spinach