What raw vegetables do you eat? Do you do any prep to them?

onions, garlic, mushroom, leek, carots, peppers (with lemon or fermented - I let them get very ripe and soft or I get them at the market, that's the ones nobody want but are the most nutritious)

You should cook mushrooms for better nutrient absorption. They have thick cell walls full of chitin that needs to break down during cooking, so eating them raw isn't great for you

even for https://en.wikipedia.org/wiki/Agaricus_bisporus? I masticate them well, and it tastes good

I see what you mean, for example for tomatoes as well, but it's a compromise, cooking destroys other valuable things

Cooking also activates other nutrients, such as for dark greens such as spinach which is full of oxalic acid which breaks down during cooking so you can absorb more calcium and iron.

The mushrooms you posted definitely are absorbed better in the body by cooking them. All mushrooms have chitin in the cell wall that needs to break down by cooking to digest.

I live in Germany and went vegetarian some 15 years ago. Traditional German food is hardly agreeable with a vegetarian diet, so I learned other dishes. Then at some point, I started eating fish again, and that's where I ended up.

I also came to be on a high fiber diet for a while, as you describe, but I got some stomach issues from it and had to adjust it.

Ok, I'm in France, I can relate because the traditional French food is bread, cheese, meat, etc.. even around mediterranean. I haven't eat bread since years and for fibers, it takes time to transition (your guts bacteria), and also relearn how to masticate efficiently, typically I eat almost everything (seeds for example grapes, melons, watermelons, skin when possible, e.g kiwis, persimmons, grapes, mangoes, many others), I like it more than the juice itself