Heat 1 1/2 cup of cream to a simmer in a small saucepan over med low heat.
Add tea mix, stir in to combine well.
Remove from heat cover and let steep for 30 min.
Strain tea mix through a fine mesh sieve pressing to get as much of the liquid out as possible. yield will be around 1 cup of liquid, with small specs of tea in it.
Chill this in refrigerator till cold or overnight.
Place vanilla, 2/3 cup condensed milk, 1/4 tsp salt and 1 cup cream in mixer.
Whisk on low until combined, then increase speed to medium-high and beat until you have soft peaks.
transfer to large bowl and fold in walnuts.
pour chilled tea mixture into mixing bowl,add 2/3 cup condensed mild, 1/4 tsp salt and 1/4 tsp passion fruit extract.
Beat on low until combined,increase speed to medium-high and beat till soft peaks form.
pour tea mixture into bowl with vanilla base and gently flod together a couple strokes so the color forms swirls.
Cover with plastic wrap and freeze al leas 6 hours or overnight.