For the cauliflower:

• 2 Tbsp. fresh lemon juice
• 2 tsp. corn starch
• 1/2 tsp. ground cumin
• 1 tsp. ground turmeric (divided)
• 3 tsp. garam masala (divided)
• 1 1/2 tsp. salt (divided)
• 2 Tbsp. olive oil (divided)
• 1 medium head of cauliflower (cut into florets)

For the sauce:

• 3 Tbsp. unsalted butter
• 1 yellow onion (finely chopped)
• 3 garlic cloves (minced)
• 2 tsp. freshly grated ginger (or ground ginger)
• 2 Tbsp. tomato paste
• 1 tsp. paprika
• 1/4 tsp. ground cinnamon
• Pinch of cayenne pepper (optional)
• 1 8-oz. can tomato sauce
• 2 cups vegetable broth
• 1/2 cup heavy cream (or full-fat canned coconut milk)

For serving:

• Basmati rice
• Fresh cilantro and whole-milk Greek yogurt for garnish