Cooking lean pockets in toaster oven? I've been revisiting frozen food due to COVID, including one of my old favorites, hot/lean pockets.

Years ago, I used to always make these in the toaster oven; they are much, much better that way than microwaved. I also tried to avoid lean pockets — couldn't exactly say why, maybe a notion that they are less flavorful or have more artificial ingredients¹ — but any more only it's hard to find vegetables (other than tomato); if you want green, you have to go lean pockets.

However, the cooking instructions are "not recommended for regular oven or toaster oven", and no (oven) directions are given. This makes me very sad!

Does anyone know why this is, and can I cook them in my toaster oven anyway? (If necessary, I'm willing to invest in a probe thermometer so that I can cook to temperature rather than having to guess at cooking time.)

p.s. I can't figure out what tags would be useful; help from folks that know the tags better would be appreciated!

(¹ Yes, I realize the likely idiocy of this. Please don't judge me .)
First and foremost, this. 

Second, according to the company their test kitchen tests all products in the microwave and oven and they have instructions for what they find works best. If the oven doesn't cook to a certain standard they only list microwave instructions. Note that all their products are pre-cooked so you don't have to worry about not fully cooking from a food safety standpoint. 

I suspect that some hot pockets have a higher thermal mass and cooking in an oven would easily lead to overcooked shell and undercooked interior. I looked at their web site and some lean pockets have microwave instructions and some do not. I would suggest cooking in the toaster oven at a lower temperature for longer and they should turn out fine. But let us know how it goes. Obviously don't use the sleeve. 

You may also want to turn up the temperature at the end of the cook to brown better after the inside is properly heated.