Hamburger Soup

Bahan-bahan (6 porsi)

• 2 tablespoons extra-virgin olive oil
• 2 pounds lean ground beef
• 1 small yellow onion (diced)
• 3 stalks celery (diced)
• 3 tablespoons tomato paste
• 3 cloves garlic (minced)
• 1 teaspoon kosher salt (plus additional to taste)
• 1/2 teaspoon ground black pepper (plus additional to taste)
• 1 teaspoon dried oregano
• 1/4 teaspoon cayenne pepper (plus additional to taste)
• 1 10 -ounce can diced tomatoes with green chiles in their juices
• 1 medium Yukon gold potato (scrubbed and ½-inch diced)
• 1 red bell pepper or green bell pepper (diced)
• 1 tablespoon Worcestershire sauce
• 3 –4 cups low-sodium beef broth
• 1 pound frozen mixed vegetables (no need to thaw)
• 1 1/2 cups shredded sharp cheddar cheese (or colby jack or pepper jack)
• chopped green onions (for serving)