Yes, I’m adding my own version to the many, many (crustless) mini quiche recipes already out there because the concept works so well, yet begs for adaptation and substitution. I love playing with mini quiche variations (I also have a mushroom onion mini quiche recipe) and in this version I used bell peppers and spinach in this instance, but really you could replace the spinach with anything dark and leafy like collard greens, kale, turnip greens, mustard greens… and the bell pepper with any vegetables that’s comparatively firm (carrot, roasted sweet potato or parsnip chunks, celery). I like the combination of leafy and firm vegetables because they make for an interesting texture variation, but that’s simply a preference of my own.
The sausage meat is great to add a salty pop of complex flavor; I used a grain-free spicy Italian type for a little bit of heat. You’re welcome to play around with different types of sausage meat, plain ground beef, pork, chicken or turkey. Even bacon bits might be tasty (although perhaps reduced to ¼ lb).
One note about the silicone muffin pan that I used to develop this recipe: it’s the OvenArt Bakeware Silicone 12-Cup Muffin Pan, and I can’t recommend it enough. Silicone muffin pans make mini quiche or egg muffin recipes possible without slaving over the cleanup, soaking your pans, and scraping burnt egg off. It’s hard to admit, but I have literally thrown metal muffin pans in the trash after attempting similar recipes to this one in the past. No matter how “non-stick” the muffin tins claimed to be, or how much I greased them, I always left almost half of my precious mini quiche treasure stuck to the pan. :'( So this time I upgraded to OvenArt Bakeware and am so thankful I did. It makes turning the cooked mini quiches out onto a plate a breeze, and cleanup is the work of moments as you briefly soap them down (they’re also dishwasher safe). I was concerned about the potential toxicity of my food in contact with silicone at high temperature, but I did my research and was happy to discover that OvenArt Bakeware silicon muffin pans are crafted from 100% BPA-free, filler-free premium silicone without the use of harmful chemical coatings such as Teflon, and won’t produce a smell when heated or effect the taste like lesser silicone bakeware. You can use them in the oven of course (safe up to 480° F), the microwave, and the freezer. I’m never going back to metal muffin pans for mini quiche baking!