In a resealable plastic bag combine onions, garlic, lemon juice, beer, vinegar and chili seasoning. Massage the back to mix the ingredients. Place the steak into the bag, squeeze the air out and seal. Marinate in refrigerator for at least 4 hours, or overnight but no more than 18 hours.
Set up grill or grill pan over medium-high heat. Oil grate when ready to start grilling. Let steaks stand at room temperature for 20 to 30 minutes before grilling. Remove steak from marinade. Place on hot, oiled grill and cook 4 minutes per side for medium rare (145 degrees F). Pour the marinade into a large skillet over medium heat. Reduce by a half or until thickened, about 10 to 15 minutes
Transfer steaks to a cutting board and let rest for 5 minutes before cutting. Slice steak across the grain and serve with Zesty Rice Salad and reduced marinade.
Heat oil over medium heat in a medium sauce pot. Add garlic, and rice and saute for 2 minutes until rice is toasted. Add 2 1/4 cups water, chili seasoning and season with a pinch of salt and pepper and bring to a boil. Cover, reduce heat to low and simmer for 15 minutes. Remove to a baking sheet and let cool.
In a large bowl combine onion, yellow pepper, cooled rice, beans, vinegar and cilantro. Mix well and serve with steak.
Yield: 4 servings