Place garlic cloves in a food processor, and process until minced. Add ginger, cumin, curry, and red pepper, and process until blended. Add peanuts and hot water, and pulse until well-blended, scraping sides of bowl occasionally.
Cut pork crosswise into 1-inch slices. Place each piece between 2 sheets of heavy-duty plastic wrap; flatten each piece to 1/2-inch thickness using a meat mallet or rolling pin. Coat pork with cooking spray. Heat a large nonstick skillet over medium-high heat. Add pork; sauté 2 minutes on each side or until browned. Place pork in a shallow bowl. Add soy sauce and 2 tablespoons water to pan, scraping pan to loosen browned bits. Add soy sauce mixture to pork; keep warm.
Add onion to pan; sauté 3 minutes. Add 1/4 cup peanut mixture; cook 4 minutes. Stir in 1/4 cup water, coconut milk, sugar, salt, and black pepper. Return pork mixture to pan; bring to a boil. Reduce heat; simmer 1 minute. Combine remaining peanut mixture with rice. Serve pork and sauce with rice.
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