To make the flax eggs, combine the flax meal and water in a small bowl and mix well. Set aside for 10 minutes to gel.
3. Step
In a large bowl, combine the oats, quinoa, baking powder, salt, maple syrup, coconut oil, vanilla, flax eggs, and bananas, and mix until well-combined.
4. Step
Divide the base dough equally between 4 medium bowls.
5. Step
Add the peanut butter and chocolate chips to 1 bowl and mix until combined.
6. Step
Add the apple, walnuts, cinnamon, and nutmeg to another bowl and mix until combined.
7. Step
Add the carrots, cinnamon, nutmeg, and almond butter to another bowl and mix until combined.
8. Step
Add the almond butter, strawberries, raspberries, and blueberries to the last bowl and mix until combined.
9. Step
Grease 2 9x13-inch (23x33-cm) baking pans with nonstick spray. Transfer the bar mixtures to the pans, packing each mixture into half of a pan with a spoon or spatula.
10. Step
Bake for 25-30 minutes, until the edges are slightly golden brown.
11. Step
Remove the pans from the oven and let the bars cool for 20 minutes, then refrigerate for at least 30 minutes, or up to 5 days. Gently cut each flavor into 6 bars, then remove from the pans with a spatula.