A healthier version of my favorite appetizer dip, with caramelized onions and dill.
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 and stir.
Continue stirring onions occasionally for ~30 more minutes, adding 3 Tablespoons of water in 10 minute intervals.
Remove onions from the heat and let cool for ~10 minutes. While the onions are cooling, stir together the sour cream, Greek yogurt, chopped dill, salt and pepper.
Add the cooled onions and chill the dip until ready to serve.