Coat bottom of pan with oil. Add onions and, stirring frequently, cook until softened and starting to brown, about 10 minutes.
2 tbsp extra virgin olive oil
Heat a skillet over medium-high heat.
Wash and slice mushrooms.
1 lb cremini mushrooms
Season steak generously with salt and pepper.
1 ½ lb ribeye steak
about ¼ tsp salt
about ¼ tsp black pepper
Coat bottom of skillet with oil. Place steak in the skillet and cook until desired doneness, 2-5 minutes per side. Transfer to a plate and loosely cover with foil.
2 tbsp virgin coconut oil
Add mushrooms to pan with onion. Season with salt and pepper. Stirring occasionally, cook until tender, 5-6 minutes.
½ tsp salt
¼ tsp black pepper
Wash and dry arugula.
1 (5 oz) pkg baby arugula
Add vinegar to onion and mushrooms. Scrape up browned bits from the bottom of the pan and stir until liquid thickens, 2-3 minutes.
4 tbsp balsamic vinegar
Thinly slice steak against the grain.
To serve, arrange a bed of arugula on a plate, add onion and mushrooms, and top with steak slices. Enjoy!