Bareich is when two things happen:

(1) We say the 'grace after meals' or 'birkat hamazon' (or not)

(2) We fill our glasses again, say the prayer and drink a third cup of wine to honour the joy of being together around this table on this festive evening.

Baruch atah adonai, elohaynu melech ha'olam, borei p'ri ha'gafen.

haggadah Section: Bareich
Source: Original