Beef stir-fry with black pepper and garlic

So the 'challenge' is officially over now. I will try to still do as much Paleo food as I feel like but there will be other recipes as well. It's a very nice season coming up now; spring. When the sun starts coming out you get more of an urge to be outside and not stand in the kitchen cooking. Today's recipe is not really Paleo and it was really nice.

Ingredients
(serves 4)
500 g beef, cut into thin strips
1 tbsp soy sauce
1 tbsp rice wine
2 tbsp oil
½ tbsp sesame oil
1 tsp black pepper
3 garlic cloves, finely chopped
1 onion, sliced
2 capsicums, sliced
4 tbsp oyster sauce

Mix the beef, soy sauce, rice wine and pepper together in a bowl. Heat the oils in a wok pan, add the onion and garlic. Fry for about 3 minutes. Add the beef and fry for another 5 minutes. Add the capsicums and the oyster sauce. Sitr-fry everything for about 2 more minutes. Serve the stir-fry with cauliflower rice.