Slow Cooker Chicken Tikka Masala

Name: Slow Cooker Chicken Tikka Masala
Prep time: 10 min
Cook time: 3 h
Total time: 3 h 10 min
Cuisine: Indian
Ingredients: 2 lbs boneless, skinless chicken thighs; 1/2 tsp kosher salt; 1/4 tsp black pepper; 3 Tbsp vegetable oil; 1 medium yellow onion (minced); 1 serrano pepper (seeded and minced); 2 Tbsp tomato paste; 1 Tbsp garam masala; 1/2 tsp smoked paprika; 1/2 tsp ground tumeric; 1/4 tsp ground cumin; 1 - 2 tsp granulated sugar; 1 Tbsp fresh ginger (grated); 3 cloves garlic (minced); 15 oz can tomato sauce; 3/4 cup whole-fat plain yogurt ((not greek)); 2 Tbsp fresh cilantro (minced)