I'm sorry to say that only now, my DD has finally left the fussy phase...she 7 years old.
I always had a 'heres dinner, eat it or don't eat it. I never offered alternatives. Some days it was harder than others but we got through it.
remember, a child will ONLY eat then they are hungry. Kids eat for the week...think about what they eat during the day and over a week rather than everyday.
Does your DD have formular still? If so, maybe cut that out. She will be getting everything she needs from the formular so will not be hungry for food.
Good luck. Its sucks and its hard but stick to your guns.