Heat a large pot over a camp stove or steady campfire grate.
Add the olive oil.
If you are using raw ground beef, cook it first until browned, then drain off excess grease.
If your meat is already cooked, move right to the vegetables.
Add the zucchini and bell pepper.
Cook for about 3 to 4 minutes, stirring now and then.
Pour in the pasta, diced tomatoes with the liquid, and broth.
Stir in the garlic powder, Italian seasoning, salt, and pepper.
Give it a good stir so the pasta is not clumped together.
Bring the pot to a low boil.
Cover and reduce the heat to a steady simmer.
Cook for 10 to 12 minutes.
Stir every few minutes so the pasta does not stick on the bottom.
Once the pasta is tender, stir in the cheese.
Add the spinach last if you want it.
Let it wilt for 1 to 2 minutes, then serve.