Rough-chop some garlic, and stick 450-degree oven for a few.
Heat some olive oil on a pan, brown some more garlic, throw on the mushrooms.
Good so far?
Take that garlic outta the oven – it needs a break.
Slather some more olive oil over some bread.
Chop/smoosh (yes, smoosh) that oven-roasted garlic (carefully – they might be hot!), and spread over bread.
Drop the mushroom on top, and – why not? – some sesame seeds while you’re at it.
Stick all back in oven.
Reduce temp to 350 for 10 more minutes (or something). Or keep at 450 for a shorter time if you can’t wait. And actually, it just depends on how long your bread takes to toast.
Hey, it’s a vague process. But it’s okay. Variables are exciting!