Being vegan—bring on the plants:An excellent site to explore is Vegan Outreach, especially the online version of their Why Vegan? brochure. The main thing is to find out, think, observe, consider.
Specific foodstuffs that may induce happiness:
Scroggin:Nuts, dried fruits, seeds, and chocolate chips. Instead of lunch, consume liberally throughout the day.
Vice Cream:In short, cashews, maple syrup, and water have an interesting group experience with a blender, a fridge, and an ice cream maker. The result is an exceptional ice-cream-like product. One needs a blender with some oomph. The book is here.
Coconut hot chocolate:Recipe here, exposition here.
French lentil sauce:
Here's how it works: