Dijon Marinated Pork Tenderloin

I made this probably a week and a half ago. I can't remember the exact measurements so I'm just wingin' it. You may need to adjust.

Ingredients:
1 lb. pork tenderloin
2 Tbsp. Dijon mustard
1 Tbsp. soy sauce
1 Tbsp. Worcestershire sauce
3 Tbsp. olive oil
1 clove garlic, finely minced
1/2 onion, chopped
Lawry's seasoned pepper

Mix marinade until well combined and pour over pork tenderloin. Let marinate 2 hours. Cook pork at 350 for 45-60 minutes. Let rest for 5-10 minutes before slicing.