Easy Instant Pot Cheeseburger Soup

Ingredients

• 1 tbsp salted butter
• 1lb extra lean ground beef
• 1 cup whited onion, diced (approx. 1 med.)
• 2 cups celery, diced (approx. 4 stalks)
• 4 cups carrots, diced (approx. 5 small)
• 1 tomato, diced
• 4 garlic cloves, minced
• 2 tbsp all purpose flour
• salt and pepper, to taste
• 4 cups no salt added chicken broth
• 15 oz Yukon gold potatoes, peeled and diced
• 1/4 of a large head of cauliflower, cored
• 1 + 1/2 cup shredded light sharp cheddar cheese
• 2 tbsp chopped green onions