1 Add 1/3 cup (80 ml) chia seeds to a resealable container and pour in 2 cups (500 ml) of water. 2  Whisk well and let it sit for 5 to 10 minutes. 3  Whisk the mixture again and let it sit in the refrigerator for 15 minutes or until it turns into a gel.4  Mix 3 Tbsp (45 ml) of lemon juice into the gel. Add 1/3 cup (80 ml) chia seeds to a resealable container and pour in 2 cups (500 ml) of water. 2  Whisk well and let it sit for 5 to 10 minutes. 3  Whisk the mixture again and let it sit in the refrigerator for 15 minutes or until it turns into a gel.