In a medium pan, heat up 1 tbsp olive oil. Add 1/2 chopped sweet onion to the pan, and saute until translucent. This should take about 5 minutes.
In a bowl, use your hands to combine all of the ingredients together (1 lb ground beef, 1/2 lb ground lamb, 1/2 tsp salt, 1/2 tsp pepper, 2 1/2 tsp onion powder, 1 1/2 tsp paprika), including the cooked onions.
Cover and let sit in the fridge for about 30 minutes.
Using your hands, form small cevapi balls about the size of a golf ball. Then, press them into an oval shape.
Place 3 cevapi on each skewer and set aside.
Heat up a charcoal grill. Place the cevapi skewer on the grill, and cook them for about 5 minutes until they are browned on one side. Then, flip them over and cook them on the other side. Continue cooking until they are cooked through.
You may also pan fry the cevapi or cook on an indoor, electric grill.