I don't understand "good" versus "bad" with regards to spinach and chicken...
I generally eat very well no matter what, my "performance" sport is lifting, so I take it very seriously. I stick with the basics no matter what... Lean Beef, Chicken Breasts, Ground Turkey, Lean Deli Meats, Egg Whites, Oatmeal, Brown Rice, Whole Wheat Pasta, Sweet Potatoes, Whole Wheat Bread, Olive Oil, Tree Nuts, etc...
Basically I stick with lean protein, complex carbs, and healthy fats.... Bland foods can be easily avoided with proper seasoning.