Heat the olive oil in a large skillet, then add the shallots, garlic and mushrooms and saute for 2-3 minutes
Add the tomatoes, water chestnuts, chili paste and spices
Add the cooked shrimp and toss to coat and warm (note: if you didn't buy cooked shrimp, you'll need to cook it now for 2-3 minutes until it's opaque, rather than just tossing to warm it)
Add the coconut milk and cook until it bubbles slightly, then turn down to low
Add fresh chopped or torn cilantro and any additional salt and pepper as desired
Serve over cooked rice (or quinoa) and garnish with fresh lime juice and cilantro