You are turning this into a battle, don't. Some children simply aren't that hungry when you want them to be, so put back mealtimes a bit. Take the cue from her.
She is only 14 mths old! Meals don't have to be prepared specially, in fact if you put too much into the preparation each time, you're going to overreact if she rejects it.
At her age she does not need any 'snack' type food like junk, crisps etc, as it distorts the taste buds.
Keep it simple, nutritious and healthy. My babies liked feeding themselves so I would give them a platter of different things to try, eg slithers of cheese, raisins, peas, sausage, bread roll, orange segment, breakfast cereal flakes, sweetcorn, things that they could grasp, suck, play with etc.
As soon as they are bored, take the cue and take the food away.
(of course don't leave them just in case of choking), but it is a great way for them to enjoy the tastes, textures, feel of food. Mine did not like being fed with a spoon so this was a great alternative.
Let her chew on a peeled but uncut banana, give her a whole peeled apple to play with, lick etc, give her the spoon and some warm cottage pie and let her feed herself. Same with a pot or dollop of yogurt.
In short, keep it fun, varied, eat with her too, make funny faces, say yum! She'll copy you and the whole experience will be turned around.
Make sure she is hungry first and don't ruin her appetite with sweets/junk between meals as they can get surprisingly full.
Good luck!