Puncture the tenderloin with large, gaping holes/gashes on all four sides (for the sauce to penetrate into the meat and not just glaze it on the surface).
Generously sprinkle the tenderloin with the 3 commercial seasonings above (Accent, Mrs. Dash, and Nature's Seasoning).
Blend the olive oil, lemon juice, thyme and garlic together in a small bowl (again don't forget to double or triple the ingredients).
Pour the sauce over the entire seasoned pork tenderloin, with fatty side facing up in a baking pan.
Bake, uncovered, and roast for 2 to 2-1/2 hours at 350 degrees or 45 minutes per pound or 170 - 185 internal degrees on a meat thermometer.