Heat oil in a large skillet over medium-high heat. Add the beef, onion, garlic, ½ teaspoon salt and ¼ teaspoon pepper. Cook until the beef is no longer pink (breaking up the meat as it cooks), about 5-7 minutes. Drain.
Reduce heat to low; stir in corn, zucchini, tomato, basil, thyme, butter and Worcestershire sauce. Cover and cook, stirring occasionally, for about 10 more minutes (or until the vegetables are tender). Season with additional salt and pepper, to taste.
Notes
This is a mild dish with simple seasonings. You can play around with the spices that you use by adding more seasoning for stronger flavor; by mixing up the herbs and using parsley, cilantro, rosemary, or oregano (for example); or by including cayenne or crushed red pepper flakes for a little bit of kick. Additional spices that go well with ground beef include curry powder, mustard powder, chili powder, cinnamon, ginger, and cumin. Just taste as you go and adjust to suit your preferences.
Try other veggies, such as diced sweet bell peppers.
Swap out the Worcestershire sauce for soy sauce.
Use ground chicken or ground turkey instead of the beef.
Double all of the ingredients to feed a larger family.