I do this a lot with my clients when they come over here for visit; 6 places in a day is easily do-able.
1)

HK bbq master.
Nothing beats this as one of the hole in the wall meals fitting the budget.
2)

Noodles / pasta
Ramen... any good place (eg// in Japan Ichiran Ramen 一蘭).. but for now in Van Danbo is my go to.

Ask for Luigi
3)

To be honest, deep fried something is a must for me so phnom-penh or good old HK style chicken wings (aberdeen) would do.
4)

Aburi sushi but I insist it to be Salmon Belly.
5)

Basil ice cream, Whiskey Hazelnut, Akbar Mashti, salted caramel etc.. take your pick
OR

Beta 5
6)
A good meaty sandwich: meat and bread OR La Grotta Del Formaggio
Crispy panini (With artichokes+spicy Capocollo+dion mustard) versus roast Porchetta with crispy skin is hard to decide.