1Preheat the oven to 350°F.
2In a big bowl, mix the oats, nuts and salt. In another bowl, combine the yogurt with the peanut butter, maple syrup, eggs and chia seeds.
3Combine the wet mix and the dry mix. Add chocolate.
4Pour the preparation in a pan lined with parchment paper, and put in the oven for 20 minutes.
5Let cool completely, gently unmold and cut into squares.
6The bars will keep in the fridge for up to six days.