A simple, healthier version of your favorite game day dip.
Chop the onion into small pieces. Add 1 Tablespoon extra virgin olive oil and 1 teaspoon butter to a saute pan on medium.
Once the oil shimmers, add onions. Continuing cooking onions on medium and stir every few minutes. After 10 minutes, add 1/4 teaspoon salt to the pan, 2 Tablespoons of water, and stir.
Continue stirring onions occasionally for ~20 more minutes, adding 2 Tablespoons of water in 10 minute intervals.
Remove onions from the heat and let cool for ~15 minutes. While the onions are cooling, stir together the Greek yogurt, chopped dill, salt and pepper.
Stir in onions and the dip is ready - chill until ready to serve.