Vegan Ricotta/tuna?

Ari

hi, I'm 14 I've been vegan for about 6 months now and i have been trying to convince my mom and little sister to go vegan with me. my sister has been long slowly transitioning to fully vegan and my mom is almost there expect she just won't give up ricotta and tuna. does anyone know of any vegan ricotta recipes for me use in things like stuffed shells or lasagna? and does anyone know of any sort of tuna replacement that actually tastes good? because the only one of heard of is "vegan toona" and all the reviews say it tastes horrible.