M.F.
Don't panic! My son does the same exact thing with his speech. He is getting better as he practices. We repeat words to help him, and we over annunciate the words and each syllable of the word. This has helped him some. We also realized that he was blending words because we say them so fast sometimes... so we slow down and put a deliberate space in between phrases that have two or more words. This helped too.
And the advice my pediatrician gave us on vegetables was this ... "it is your job to offer the vegetables. you can't make them eat it. but just offering gets the point across. Some kids go through hot dog phases, or potato phases, but eventually watching you eat them, and you offering it to them will get it done."... he's right. (he has 4 kids of his own, so he walks the walk)
If her nutrition worries you, you might start her on flintstones (if you don't already)... they contains a good bit of what they need daily. Just make sure she eats something before you give it to her. My niece has taken them on an empty stomach and the results weren't pretty.