Remember when Biden just plain didn't nominate someone to the board?

It's not as accurate as mass spec but generally speaking you can test for geavy metals using certain acid and color changing indicators (in known concentrations) over a range of sample dilutions. Even better if you have a reference sample of a known concentration of the target, like manganese. Sometimes the chemical is not itself an acid but nevertheless reacts with the target.

For example, high concentrations of manganese will react with peeiodate to make a red/broan color. You can buy a set of 100 pouches of periodate for manganese testing on Amazon for $50.

In this case I would recommend basically boiling it in a little salt first (put in a much taller bowl with water and nuke until boiling). This will give it a cleaner taste for later steps, especially if you just eat it with a nice sauce, which is a 100% legit option. Usually this would be done with a fresh softer tofu but this boiling trick can make it work very well for firm as well.

If you want yo have it with a sauce straight, then (carefully) pour out the water and replace with cold water. Repeat as necessaey until the tofu is chilled. Havr a nice chili oil or hoisin or a peanut sauce (or whatever you want!). Some chopped scallion will bring it all together.

If you want to prepare it to have more texture as part of another dish, make use of that convection option ans treat it like an air fryer as best you can. Cut into cubes, dry the outside (possibly rolles in a little starch or rice flour / wheat flour) and spritz a little oil, then blast with convection. I have never used a convection microwave but I feel like this should make it crisp up. You can then use it in a ton of different dishes, especially east asian and southeast asian ones.

You can also (cold) brine your tofu after the boiling step and use it as a paneer substitute in south asian food.

Without being greedy

Costco has the same profit onus of every other company it just uses a slightly different business model that means ita members get huge volumes of cheap goods. That's it.

It is exactly as greedy as every company anykne dislikes. The oppression of capitalism is not due to greed, it is a built-in mechanism that profits must be maximized. It doea not matter how highly a business owner or customers think of the company, it is a profit-generating machine or it will die.

Example: Costco always fights the union.