Instant Pot Vegan Sloppy Joes

Ingredients

• 1/2 cup onion, diced
• 1/4 cup red bell pepper, diced
• 1 rib celery, finely chopped
• 2 cloves garlic, minced
• 2 cups cauliflower, finely chopped or 'riced'
• 1/2 cup portabella mushrooms, finely chopped
• 1/4 cup walnuts, finely chopped (optional)
• 1/2 cup water
• 1 Tbsp vegan worcestershire
• 1 Tbsp low-sodium soy sauce
• 1/2 tsp chili powder
• 3/4 cup ketchup
• 1 Tbsp maple syrup
• 1 tsp dijon mustard
• 1/4 cup old-fashioned rolled oats (if necessary)
• 1/4 tsp red wine vinegar