Shallot vinaigrette

I made a simple green salad the other day, just mixed greens, cucumber, and goat cheese. The onion flavor of this dressing was perfect with it. The recipe calls for shallots, but you could use red onion or sweet onion instead.

1 finely chopped shallot
2 tablespoons fresh lemon juice
1 tablespoon rice vinegar
Salt and pepper
1/3 cup olive oil

Combine the first four ingredients in a jar and let sit 20 minutes at room temperature. Add the olive oil, shake to combine, and serve.