In a large pot, turn the heat on medium-high, add oil and saute the shallots and garlic for a few minutes, followed by the mushrooms and lemongrass.
Add the Thai red curry paste into the mixture.
Pour in the beer and mix all the ingredients around. Add in the can of coconut milk, kaffir lime leaves and galangal slices.
White wine is a good substitute for beer.
If you want the recipe alcohol-free, you can swap the beer for an extra can of coconut milk, vegetable, or seafood broth.
Use tomato variety of choice.
Can swap the leafy vegetable of choice in the recipe or omit.