For a fulfilling, but easy, breakfast bagel, I fried one slice of bacon. When it was nicely crisped, I removed it and let it rest. While it cooked, I chopped 2 tbsp of yellow onion, 2 tbsp of fresh red pepper and 2 stalks of fresh kale. I chopped everything to about 1.4 inch size. After I removed the bacon slice, I tossed the onions in the bacon fat along with a pinch of anise seed. I let the onions get tender and added the red pepper. When the red peppers softened just a bit, I tossed in the kale.
As soon as I added the kale, I put an Everything bagel in the toaster to toast. When it popped up, I spread some cream cheese on each half. I then spread the kale and red peppers on top of the cream cheese. I sliced the bacon into 4 pieces and put two pieces on bagel half. This made two servings, or two half bagels.
You could make a vegetarian version without the bacon because the kale was delicious with the cream cheese and bagel on its own.