The recommended protien requirement is around .8g per day per kg of body weight, and double that is enough if you work out (you can go even lower to around 1.2g per kg, while still seeing significant gains), everthing above that get diminishing returns:

• https://blogs.cdc.gov/nchs/2010/03/03/953/
• https://www.health.harvard.edu/blog/how-much-protein-do-you-need-every-day-201506188096
• https://www.bhf.org.uk/informationsupport/heart-matters-magazine/nutrition/protein
• https://www.massgeneralbrigham.org/en/about/newsroom/articles/how-much-protein-when-working-out
• https://pmc.ncbi.nlm.nih.gov/articles/PMC8978023/

Assuming you weight 80kg, then you will need only around 96g – 128g of protien per day, and everything above 160g will likely be a waste and they can even cause digestive problem for me.

One pack of super firm tofu https://www.traderjoes.com/home/products/pdp/high-protein-organic-tofu-083089 or 500g of falafel https://en.wikipedia.org/wiki/Falafel#Nutrition provides around 70g of protien. Plus many daily food like grain, beans also provide a good amount of protien: https://www.nal.usda.gov/sites/default/files/page-files/Protein.pdf For example:

• one cup of all purpose flower gives you 12g of protien
• one cup of pasta, again, 12g
• one cup of long grain rice, 13g
• a bagel provides 10g of protien.

So I feel it is pretty trivial for me to reach the required protien in take if I just add some tofu and plant-based meat in my diet, and perhaps most importantly, eat 3 meals a day. If anything, I need to sometimes scale down a bit in protien intake, since it is very easy to go over board and cause problem in digestion.

For me, most of the high protien source are tofu, gluten, and plant-based meat. I also mainly eat mix grains, and add chickpeas in my rice.