Learn Italian: È vero che qualcosa di piccante è sempre buono da mangiare? - Is it true that something spicy is always good to eat?

When an adjective like buono (good) or facile (easy) is followed by an infinitive verb to describe a noun or pronoun, Italian uses the preposition da. While English simply says "good to eat", Italian requires buono da mangiare.

Why is there a di between qualcosa and piccante?

Whenever you use an indefinite pronoun like qualcosa (something) or niente (nothing) followed by an adjective, you must connect them with di. So, "something spicy" becomes qualcosa di piccante, not just qualcosa piccante.

Why is the adjective buono masculine if qualcosa ends in an "a"?

The word qualcosa (something) is always treated as a masculine singular pronoun in Italian, despite ending in "a". This is why the adjective referring back to it later in the sentence is the masculine singular buono.

Since the sentence starts with è vero che, shouldn't the next verb be in the subjunctive?