Chicken Tikka Masala

Name: Chicken Tikka Masala
Ingredients: 1 cup plain Greek yogurt; 1 tablespoon lemon juice; 2 teaspoons cumin; 1 teaspoon black pepper; 1 teaspoon ground ginger; 1 teaspoon salt; 1/2 teaspoon cinnamon; 1/4 teaspoon cayenne pepper; 10-12 boneless skinless chicken tenders, ~1 pound, cut in bite size pieces; For the Sauce:; 2 tablespoons butter; 2 cloves garlic, minced; 1 jalapeno pepper, veins and seeds removed, finely chopped; 2 teaspoons ground cumin; 2 teaspoons paprika; 1 8 ounce can tomato sauce; 1 cup whipping cream; Cilantro, for garnish