Easy Instant Pot Hamburger Soup

Ingredients

• 1 tsp sugar **optional, but it helps cut the acidity and bite of the tomatoes
• 1 tbsp olive oil
• 1 lb. ground beef
• 1/2 tbsp beef base
• pepper to taste
• 1 tbsp Worcestershire sauce
• 1 12 oz bag of frozen mixed vegetables
• 2 garlic cloves, minced
• 32 oz beef broth
• 1 tsp fresh rosemary, minced **optional, but recommended
• 1/2 tbsp tomato paste
• 1 15 oz can diced tomatoes
• 1/2 tsp salt
• 1 russet potato, peeled and cut into 1/2-1 inch dice
• 1 yellow onion, diced