Cook bacon over medium heat in a heavy bottomed braiser until crispy. Remove the bacon, leaving the grease.
Add the onion to the bacon grease and a pinch of salt. Cook down 3-5 minutes until soft and slightly caramelized. Add in the collard greens, butter and the garlic powder, onion powder, pepper and ground mustard and another hefty pinch of salt. Cook down for 5-10 minutes or until wilted and tender.
Add torn bread bits and toss together in the braiser - allowing the bread to toast slightly.
Meanwhile, add the milk, eggs and salt to a large bowl and whisk until combined.
Slowly pour it into the kale mixture and add in the 1.5 cups of cheddar. Toss until combined.
Let sit while the oven preheats to 375F degrees.
Before it goes in the oven, sprinkle with remaining ½ cup of shredded cheddar and then bake for 40-50 minutes or until the eggs are cooked through and the middle has set.
Remove from the oven and enjoy