Tanzanian Style Beef Kabobs


Ingredients
1/2 teaspoon lemon zest 
2 tablespoons fresh lemon juice 
1/2 teaspoon salt 
1/4 teaspoon ground black pepper 
1 pound boneless beef cut into 1 inch pieces 
1 large red onion, cut into wedges 
1 large green bell pepper, cut into 1 1/2 inch pieces 
1 teaspoon minced ginger 
1 pound cherries tomatoes
Hot red peppers (options)