Step 1

Combine the crushed red pepper and paprika in large bowl and stir in 2 tablespoons of hot water and let stand for 5 minutes. Add the yogurt, olive oil, red wine vinegar, tomato paste, 2 teaspoons salt, and 1 teaspoon black pepper to spice mixture in bowl; whisk to combine. Stir in garlic and lemon juice, then chicken. Cover and chill at least 1 hour.

Step 2

Prepare grill over medium-high heat. Thread chicken pieces on skewers, dividing equally. Discard marinade in bowl. Sprinkle each skewer with salt and pepper.

Step 3

Grill chicken until golden brown and cooked through, turning skewers occasionally, 10 to 12 minutes total. Transfer skewers to platter.

Step 4

Serve with tzatziki and extra lemon wedges