Tuna and White Bean Salad in Avocado Cups

2 cans tuna

1 can cannellini (white) beans

1/4 red onion, chopped

1 tomato, seeded and chopped

1 lemon, juiced

1 TBSP olive oil

1 TBSP red wine vinegar

salt and pepper

2 avocados, halved and peeled

Mix all of the above ingredients through salt and pepper together.

Pour into halved avocado cups.