Tuna Bean Salad

I wanted to make a nice summer salad.  This is inspired by a salad we serve at my work.

You'll need (for 4-6 servings):

• 2 small cans tuna
• 1 can or half a big jar (think Randall's beans) of mixed beans (cannellini will work too)
• One bunch fresh chard
• 1/2 cup mayo
• 1 tablespoon (ish) red wine vinegar
• a clove or two garlic
• 1-2 tablespoons dijon mustard
• half a yellow onion, diced
• Some grated parmesan cheese
• salt and pepper to taste

Chop the chard and onion how you like and simply combine.  If you like olives, add some (chopped) kalamata olives and a bit of their brine (then use less vinegar).  Great plain or on a sandwich.