Marinate chicken breast in salsa for at least 30 minutes.
Grill the chicken until fully cooked, about 6-7 minutes per side.
Slice the grilled chicken and serve with tortillas and shredded cheese.
Heat black beans in a saucepan until warm.
Serve Mexican rice alongside the beans and guacamole.
Blend together margarita mix, tequila (if using), and lime juice in a blender until smooth.
Pour into glasses and garnish with lime wedges if desired.
Heat churros in the oven according to package instructions until golden brown and crispy.
Serve warm churros with chocolate sauce for dipping.