Tom Kha Gai (Galangal Chicken Soup)

Ingredients

2 cups chicken broth
1 large or 2 small lemongrass, pounded
2 oz galangal, pounded
2 medium or 4 small shallots, diced
2 tsp palm sugar
2 tbsp fish sauce
1 can (13.5 oz) coconut milk
1 large tomato
5 oz mushrooms (I like oyster or beech mushrooms but you can use your favorite mushrooms)
2 to 3 lime leaves, removed stems
1 to 3 Thai chilies, pounded
10 oz chicken, sliced into bite size (approximately 1 chicken breast or 2 chicken thighs)
2 green onions, chopped
Handful cilantro, chopped
1/4 to 1/3 cup freshly squeezed lime juice (approximately 2 to 3 limes)