Chicken Saag - Chili Pepper Madness

Ingredients

• 1 pound chicken thighs (chopped, or use chicken breast)
• 1 tablespoon olive oil
• 1 medium onion (chopped)
• 1 jalapeno pepper (chopped)
• 1 serrano pepper (chopped (optional, for more heat))
• 4 cloves garlic (chopped)
• 1 teaspoon fresh ginger (chopped)
• 1 pound spinach (chopped)
• 1 tablespoon garam masala
• 1 teaspoon cayenne pepper
• 1 teaspoon turmeric
• 1/2 teaspoon cumin
• 1/2 teaspoon cardamom
• 1/2 teaspoon coriander
• Salt and pepper to taste
• 1/2 cup milk (or use heavy cream)
• 1/2 cup plain yogurt
• 1 tablespoon butter