Combine all ingredients for the marinade in a bowl & add shrimp to it. Mix well to coat the shrimp evenly. Cover & set aside.
Combine all the ingredients for the sauce in a bowl. Mix well & set aside.
Heat cooking oil in a pan and add whole dried red chillies, chopped dried red chillies, whole Sichuan peppers, ginger & garlic. Sauté for 1 minute on high heat or till the ginger & garlic are cooked halfway through.
Add the snow peas (optional) & shrimp. Sauté on high heat till the shrimp begins to turn opaque, about 30 seconds.
Add the spring onion, red peppers & green peppers. Sauté on high heat for about 30 second till the peppers turn soft.
Pour in the sauce & add peanuts/cashews. Mix well on high heat for about 10 seconds and turn off heat.
Serve hot with rice or noodles. Tastes great with a side of stir-fried bok choy.