Italian steak

Name: Italian steak
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: Italian, Mediterranean, European
Ingredients: 1kg boneless sirloin tip steak, cubed; • 1 small yellow onion, diced (one cup); 60g fresh baby spinach; • 4 cloves garlic, minced; 800 g can crushed tomatoes (read the label to make sure it is Whole30-compliant); • 1 tablespoon Italian seasoning; • 1 teaspoon basil; • 1 teaspoon salt; • 1/2 teaspoon pepper; • 1/2 teaspoon crushed red pepper flakes